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[Press Release] Independent Advisory Panel Completes Review of Rail Power Supply System
#1
Independent Advisory Panel Completes Review of Rail Power Supply System
Press Release 19/04/16

1. The Land Transport Authority (LTA) appointed an Independent Advisory Panel (IAP) in December 2015 to review the power supply system for all MRT and LRT lines. The IAP comprised international specialists in power supply systems, including representatives from an overseas operator and equipment design specialists. The IAP has completed its assessment of the power supply system.

Independent Advisory Panel’s Recommendations

2. The IAP recognises that the power supply system has achieved a high availability2, but recommends that the performance of the power supply system be assessed against a more holistic perspective of system resilience. The interdependencies between the power supply system and adjoining systems, such as trackways and trains, should be considered in operating and maintenance procedures. In the longer term, the IAP recommends that the design of the rail system should provide for a maximum downtime of five minutes during faults, with system recovery achieved within 20 minutes.

3. The IAP recommended the following measures to improve system resilience in the near-term:

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MRT voltage protection system to be replaced following independent review
From: CNA
Date: 19/04/16

SINGAPORE: The Land Transport Authority (LTA) announced on Tuesday (Apr 19) that it is working with operators to replace the existing voltage protection system on the MRT network with Voltage-Limiting Devices, which will trip and isolate only specific stretches of the system where faults occur.

The Voltage-Limiting Devices have been used on Downtown Line and the future Thomson-East Coast Line, and will be progressively retrofitted on to the existing lines such as the North-South and East-West Lines (NSEWL), North-East Line and Circle Line, a LTA spokesperson told Channel NewsAsia.

This is to prevent another occurrence of the 3.5-hour disruption on the NSEWL last July. The breakdown, which affected 250,000 commuters, was traced to "weak electrical resistance" in the power supply system.

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Experts call for sweeping reform of MRT power system
From: Straits Times
By: Christoper Tan
Date: 19/04/16

SINGAPORE - A panel of power experts brought in to review the electrical system of Singapore's MRT network has wrapped up its findings with a long list of "to-dos".

The Land Transport Authority said on Tuesday (April 19) the panel has made several recommendations, including inspecting assets more frequently, replacing components more frequently, and adopting new monitoring technologies.

For instance, the panel said the third rail system should be inspected every six months until it is replaced.

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Panel lists safeguards to avert MRT glitches
From: Straits Times
By: Christoper Tan
Date: 20/04/16

A panel of electrical experts has put forward no fewer than 40 recommendations to make Singa- pore's rail network more resilient.

Roped in four months ago, the panel of 13 experts - four of them from overseas - said these recommendations should be carried out as soon as possible to minimise power-related glitches - a major cause of rail breakdowns here.

The urgent recommendations include more frequent inspections of assets and replacement of components, the Land Transport Authority (LTA) said yesterday. The panel also called for new monitoring technologies, and tighter control of manufacturers and contractors at the design and building stages.

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Ideas for rail power system 'on right track'
From: Straits Times
By: Christoper Tan
Date: 20/04/16

Recommendations to bolster the electrical system of Singapore's rail system are a step in the right direction, industry watchers say.

But they will also result in higher investments.

Associate Professor Gooi Hoay Beng from the Nanyang Technological University's School of Electrical and Electronic Engineering said more money will have to be spent on hardware component maintenance and replacement.

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#2
Early warning system for rail faults being explored
From: TODAY
Date: 22/04/16

SINGAPORE — The Land Transport Authority (LTA) and the transport operators are examining the idea of putting in place predictive and condition monitoring tools to help pinpoint abnormalities in the rail systems for early intervention.

They are also working together to review incident response measures and recovery plans, with technical exercises in a “simulated live operating environment” on the cards.

These are some of the initiatives in the pipeline following a slew of recommendations by an independent advisory panel (IAP), which was appointed in December last year to review the power supply system for all MRT and LRT lines. Among other things, the panel recommended more frequent inspections of assets and replacement of components, as well as the adoption of new monitoring technologies.

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